Hardware Guide

How To Replace RAM

How to safely remove and install RAM in your desktop PC in 9 simple steps - including which slots to use when you're installing a 2-stick kit.

By Josh Evans · Cataclysm Computers · Updated 20 October 2026

Upgrading or replacing your RAM is one of the easiest jobs you can do inside a PC. All you need is a screwdriver and about 10 minutes. This guide walks you through removing your old RAM sticks, installing the new ones in the correct slots, and getting your PC back up and running.

What you'll need

  • Screwdriver
What you'll need

Step-by-step guide

Step 1: Power off and switch off the power supply

Power off your PC and switch off the power supply.

Power off and switch off the power supply

Step 2: Discharge any remaining power

Remove the power cable and hold the power button on the case for 5 seconds to discharge any remaining power left in the PC.

Discharge any remaining power

Step 3: Remove the side glass panel

Depending on your PC, use a screwdriver to remove the screws that hold in the side glass panel to access the inside of the PC.

Remove the side glass panel

Tip: It's recommended that you lay the PC on its side.

PC laid on its side with the glass panel removed

Step 4: Release the RAM latches

Press down the plastic latches at both ends of the RAM sticks.

Pressing down the RAM slot latches

Step 5: Remove the RAM sticks

Pull the RAM sticks directly up and out of the slots.

Pulling a RAM stick out of the motherboard

Tip: BEFORE installing the RAM, make sure the latches are pressed DOWN.

RAM slot latches pressed down and open

Step 6: Install the new RAM

Insert the RAM into the slots and press firmly until you hear the click.

Installing RAM into the motherboard

If you're using a kit of 2 RAM sticks, make sure to install them in the correct slots. For most motherboards, the RAM should be installed in slots 2 and 4 (as pictured).

Two RAM sticks installed in slots 2 and 4

Your motherboard should have a diagram which indicates which RAM slots should be used first.

Motherboard RAM slot diagram

Step 7: Reinstall the glass side panel

Reinstall the glass side panel.

Reinstalling the glass side panel

Step 8: Plug the power back in

Plug the power cable into the power supply and switch it on.

Plugging the power cable back into the power supply

Step 9: Power on your PC

Power on your PC and now you're good to go!

PC powered on after the RAM upgrade

FAQ

Which RAM slots should I use for 2 sticks?

On most 4-slot motherboards, a 2-stick kit goes in slots 2 and 4 (often labelled A2 and B2). This runs the RAM in dual channel. Your motherboard manual or the diagram printed on the board shows the exact slots.

How do I know the RAM is installed properly?

Both latches should click and close by themselves, and the RAM should sit level in the slot along its whole length. If one end is sitting higher than the other, press down firmly on that end until it clicks.

My PC won't turn on after installing new RAM - what should I check?

The first boot after a RAM change can take longer than usual while the PC trains the new memory, so give it a couple of minutes. If it still doesn't boot, power off, then reseat each stick and make sure both latches are fully closed.

Can I mix different RAM kits?

It's best to use a single matched kit. Mixing different brands, speeds or sizes can cause instability or force the RAM to run at a slower speed.

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